Add python.cpython2 and adjust note on

python.security.respectJavaAccessibility, per review comments. Bug 2758.

Author: adamburkegh

registry.md

@@ -13,10 +13,10 @@ Because there is no good platform independent equivalent of the Windows Registry
 
 ## Registry Properties
 
-The following properties are recognized by Jython. More detailed documentation may be found in comments in the registry file provided with the Jython distribution. 
+The following properties are recognized by Jython. More detailed documentation may be found in comments in the `registry` file provided with the Jython distribution. 
 
 **python.path**
-Equivalent to CPython's PYTHONPATH environment variable
+Equivalent to CPython's `PYTHONPATH` environment variable
 
 **python.cachedir**
 The directory to use for caches - currently just package information. This directory must be writable by the user. If the directory is an absolute path, it is used as given, otherwise it is interpreted as relative to sys.prefix.
@@ -25,10 +25,10 @@ The directory to use for caches - currently just package information. This direc
 Sets the verbosity level for varying degrees of informative messages. Valid values in order of increasing verbosity are "error", "warning", "message", "comment", "debug"
 
 **python.security.respectJavaAccessibility**
-Normally, Jython can only provide access to public members of classes. However if this property is set to false and you are using Java 1.2 then Jython can access non-public fields, methods, and constructors.
+Normally, Jython can only provide access to public members of classes. If this property is set to false, and you are using a Java version before Java 9, then Jython can access non-public fields, methods, and constructors. This may be deprecated in the future due to Java changes to accessibility from version 9.
 
 **python.console**
-The name of a console class. An alternative console class that supports GNU readline can be installed with this property. Jython already include such a console class and it can be enabled by setting this property to org.python.util.ReadlineConsole
+The name of a console class. An alternative console class that supports GNU readline can be installed with this property. Jython already include such a console class and it can be enabled by setting this property to `org.python.util.ReadlineConsole`.
 
 **python.console.readlinelib**
 Allow a choice of backing implementation for GNU readline support. Can be either GnuReadline or Editline. This property is only used when python.console is set to org.python.util.ReadlineConsole.
@@ -39,6 +39,10 @@ File to be run at the start of each interactive session, but not when dropping i
 **python.modules.builtin**
 Add, remove, or override built in modules.
 
+**python.cpython2**
+Command used to invoke CPython, when needed, as in the case of modules and methods longer than Java supports natively.
+
+
 
 
 ## Finding the Registry File